Fluid leak inside car
run the water hose around the openings for the wiper pivots....they are notorious for leaking....there is a kit to fix it for $14.00. Also behind the stainless trip along the bottom of the windshield...could have some rust issues hidden behind....run water along the bottom of the trim...
When your done blow the water out of the crack with the air hose....no need to let it sit.
Mop